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[mininet-discuss] nox_core_dir missing env

Rizwan Jamil u_r_welcum at
Sun Dec 15 22:37:31 PST 2013

Dear Zoltan!

After installation of NOX Classic, I have a directory named "noxcore" inside the "/home/mininet" directory. But it does not contain any file named "nox_core"! So where to find the NOX executable file?


From: zoltan.lajos.kis at
To: u_r_welcum at; rlantz at; anand631 at
CC: mininet-discuss at
Subject: RE: [mininet-discuss]  nox_core_dir missing env
Date: Sun, 15 Dec 2013 17:42:14 +0000

As in the walkthrough: “NOX_CORE_DIR env var must be set to the directory containing the NOX executable”.
Execute first something like:
export NOX_CORE_DIR=/this/is/where/my/nox_core/is

From: mininet-discuss-bounces at [mailto:mininet-discuss-bounces at]
On Behalf Of Rizwan Jamil

Sent: Sunday, December 15, 2013 6:21 PM

To: rlantz at; anand631 at

Cc: mininet-discuss at

Subject: [mininet-discuss] nox_core_dir missing env



I am posting on this forum for the first time. I am using mininet 2.1.0 on VMware Workstation 10. I have installed NOX Classic by following the instructions on "Mininet Walkthrough". But after its installation, the command
"$ ./nox_core -v -i ptcp:" generates the following error:

-bash: ./nox_core: No such file or directory

And then the command "$ sudo -E mn --controller=nox,pyswitch --test pingpair" generates the following error:

*** Creating network

*** Adding controller

exiting; please set missing NOX_CORE_DIR env var

I have also deleted the line "#Defaults env_reset" from "sudoers" file in "etc" directory but no success. Then I also wrote "#Defaults root" instead of "#Defaults env_reset" in the same file but still no success.

Please reply comprehensively.


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